20012523 has 16 divisors (see below), whose sum is σ = 28354080. Its totient is φ = 12531456.

The previous prime is 20012479. The next prime is 20012543. The reversal of 20012523 is 32521002.

It is not a de Polignac number, because 20012523 - 2⁹ = 20012011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20012543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111 + ... + 6327.

It is an arithmetic number, because the mean of its divisors is an integer number (1772130).

Almost surely, 2^20012523 is an apocalyptic number.

20012523 is a deficient number, since it is larger than the sum of its proper divisors (8341557).

20012523 is a wasteful number, since it uses less digits than its factorization.

20012523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6286.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 20012523 is about 4473.5358498619. The cubic root of 20012523 is about 271.4984042586.

Adding to 20012523 its reverse (32521002), we get a palindrome (52533525).

The spelling of 20012523 in words is "twenty million, twelve thousand, five hundred twenty-three".